Ben Carson is the former director of pediatric neurosurgery at Johns Hopkins Children's Center in Baltimore. He was appointed to serve on the President's Council on Bioethics in 2004 by then-president George W. Bush. Carson garnered national attention for his 2013 speech at the National Prayer Breakfast.

Vice President Pence administers the oath of office to Carson as his wife, Candy, and granddaughter Tesora Carson, 5, hold the Bible on March 2, 2017, in the Eisenhower Executive Office Building. Carson was confirmed by the Senate as Housing and Urban Development secretary earlier that day. Andrew Harnik, AP

Carson buttons and fliers implore him to run for president at a grass-roots training rally held by the New Hampshire Republican Party at Concord High School on March 14, 2015 in Concord, N.H. Darren McCollester, Getty Images